Our stay at Supatat's place was wonderful! The apartment is great, the building facilities are unbelievable. The pool on 52nd floor looks over the entire city! There is a scheduled shuttle that takes you straight to the BTS (metro). The building is only a few stations from the centre of the city.
The owner was really easy to communicate with, very friendly and even offered to show us around Bangkok. He even checked in to make sure everything was ok half way through our visit.
I would highly recommend this apartment.